<nav class="navigator center-block" role="navigation">
  <div class="navigator-header">
    <a class="navigator-brand" ui-sref="#"><img src="image/logo.png" class="logo" alt="logo"></a>
  </div>
  <ul class="navigator-nav">
    <li ui-sref-active="active">
      <a ui-sref="index">首页</a>
    </li>
    <li ui-sref-active="active">
      <a ui-sref="index.case">优秀案例</a>
    </li>
    <li ui-sref-active="active">
      <a ui-sref="index.service">服务方式</a>
    </li>
    <li ui-sref-active="active">
      <a ui-sref="index.medium">新媒体</a>
    </li>
    <li ng-class="{ active: $state.includes('index.about') }">
      <a ui-sref="index.about.intro">关于我们</a>
    </li>
  </ul>
</nav>
